src/cargomonitor.h

   1 /* $Id$ */
   2
   3 /*
   4  * This file is part of OpenTTD.
   5  * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
   6  * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
   7  * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
   8  */
   9
  10 /** @file cargomonitor.h Cargo transport monitoring declarations. */
  11
  12 #ifndef CARGOMONITOR_H
  13 #define CARGOMONITOR_H
  14
  15 #include "cargo_type.h"
  16 #include "company_func.h"
  17 #include "industry.h"
  18 #include "town.h"
  19 #include "core/overflowsafe_type.hpp"
  20 #include <map>
  21
  22 struct Station;
  23
  24 /**
  25  * Unique number for a company / cargo type / (town or industry).
  26  * Encoding is as follows:
  27  * - bits 0-15 town or industry number
  28  * - bit 16 is set if it is an industry number (else it is a town number).
  29  * - bits 19-23 Cargo type.
  30  * - bits 24-31 %Company number.
  31  */
  32 typedef uint32 CargoMonitorID; ///< Type of the cargo monitor number.
  33
  34 /** Map type for storing and updating active cargo monitor numbers and their amounts. */
  35 typedef std::map<CargoMonitorID, OverflowSafeInt32> CargoMonitorMap;
  36
  37 extern CargoMonitorMap _cargo_pickups;
  38 extern CargoMonitorMap _cargo_deliveries;
  39
  40
  41 /** Constants for encoding and extracting cargo monitors. */
  42 enum CargoCompanyBits {
  43         CCB_TOWN_IND_NUMBER_START  = 0,  ///< Start bit of the town or industry number.
  44         CCB_TOWN_IND_NUMBER_LENGTH = 16, ///< Number of bits of the town or industry number.
  45         CCB_IS_INDUSTRY_BIT        = 16, ///< Bit indicating the town/industry number is an industry.
  46         CCB_IS_INDUSTRY_BIT_VALUE  = 1ul << CCB_IS_INDUSTRY_BIT, ///< Value of the #CCB_IS_INDUSTRY_BIT bit.
  47         CCB_CARGO_TYPE_START       = 19, ///< Start bit of the cargo type field.
  48         CCB_CARGO_TYPE_LENGTH      = 5,  ///< Number of bits of the cargo type field.
  49         CCB_COMPANY_START          = 24, ///< Start bit of the company field.
  50         CCB_COMPANY_LENGTH         = 8,  ///< Number of bits of the company field.
  51 };
  52
  53
  54 /**
  55  * Encode a cargo monitor for pickup or delivery at an industry.
  56  * @param company Company performing the transport.
  57  * @param ctype Cargo type being transported.
  58  * @param ind %Industry providing or accepting the cargo.
  59  * @return The encoded cargo/company/industry number.
  60  */
  61 static inline CargoMonitorID EncodeCargoIndustryMonitor(CompanyID company, CargoID ctype, IndustryID ind)
  62 {
  63         assert(ctype < (1 << CCB_CARGO_TYPE_LENGTH));
  64
  65         uint32 ret = 0;
  66         SB(ret, CCB_TOWN_IND_NUMBER_START, CCB_TOWN_IND_NUMBER_LENGTH, ind);
  67         SetBit(ret, CCB_IS_INDUSTRY_BIT);
  68         SB(ret, CCB_CARGO_TYPE_START, CCB_CARGO_TYPE_LENGTH, ctype);
  69         SB(ret, CCB_COMPANY_START, CCB_COMPANY_LENGTH, company);
  70         return ret;
  71 }
  72
  73 /**
  74  * Encode a cargo monitoring number for pickup or delivery at a town.
  75  * @param company %Company performing the transport.
  76  * @param ctype Cargo type being transported.
  77  * @param town %Town providing or accepting the cargo.
  78  * @return The encoded cargo/company/town number.
  79  */
  80 static inline CargoMonitorID EncodeCargoTownMonitor(CompanyID company, CargoID ctype, TownID town)
  81 {
  82         assert(ctype < (1 << CCB_CARGO_TYPE_LENGTH));
  83
  84         uint32 ret = 0;
  85         SB(ret, CCB_TOWN_IND_NUMBER_START, CCB_TOWN_IND_NUMBER_LENGTH, town);
  86         SB(ret, CCB_CARGO_TYPE_START, CCB_CARGO_TYPE_LENGTH, ctype);
  87         SB(ret, CCB_COMPANY_START, CCB_COMPANY_LENGTH, company);
  88         return ret;
  89 }
  90
  91 /**
  92  * Extract the company from the cargo monitor.
  93  * @param num Cargo monitoring number to decode.
  94  * @return The extracted company id.
  95  */
  96 static inline CompanyID DecodeMonitorCompany(CargoMonitorID num)
  97 {
  98         return static_cast<CompanyID>(GB(num, CCB_COMPANY_START, CCB_COMPANY_LENGTH));
  99 }
 100
 101 /**
 102  * Extract the cargo type from the cargo monitor.
 103  * @param num Cargo monitoring number to decode.
 104  * @return The extracted cargo type.
 105  */
 106 static inline CargoID DecodeMonitorCargoType(CargoMonitorID num)
 107 {
 108         return GB(num, CCB_CARGO_TYPE_START, CCB_CARGO_TYPE_LENGTH);
 109 }
 110
 111 /**
 112  * Does the cargo number monitor an industry or a town?
 113  * @param num Cargo monitoring number to decode.
 114  * @return true if monitoring an industry, false if monitoring a town.
 115  */
 116 static inline bool MonitorMonitorsIndustry(CargoMonitorID num)
 117 {
 118         return HasBit(num, CCB_IS_INDUSTRY_BIT);
 119 }
 120
 121 /**
 122  * Extract the industry number from the cargo monitor.
 123  * @param num Cargo monitoring number to decode.
 124  * @return The extracted industry id, or #INVALID_INDUSTRY if the number does not monitor an industry.
 125  */
 126 static inline IndustryID DecodeMonitorIndustry(CargoMonitorID num)
 127 {
 128         if (!MonitorMonitorsIndustry(num)) return INVALID_INDUSTRY;
 129         return GB(num, CCB_TOWN_IND_NUMBER_START, CCB_TOWN_IND_NUMBER_LENGTH);
 130 }
 131
 132 /**
 133  * Extract the town number from the cargo monitor.
 134  * @param num Cargo monitoring number to decode.
 135  * @return The extracted town id, or #INVALID_TOWN if the number does not monitor a town.
 136  */
 137 static inline TownID DecodeMonitorTown(CargoMonitorID num)
 138 {
 139         if (MonitorMonitorsIndustry(num)) return INVALID_TOWN;
 140         return GB(num, CCB_TOWN_IND_NUMBER_START, CCB_TOWN_IND_NUMBER_LENGTH);
 141 }
 142
 143 void ClearCargoPickupMonitoring(CompanyID company = INVALID_OWNER);
 144 void ClearCargoDeliveryMonitoring(CompanyID company = INVALID_OWNER);
 145 int32 GetDeliveryAmount(CargoMonitorID monitor, bool keep_monitoring);
 146 int32 GetPickupAmount(CargoMonitorID monitor, bool keep_monitoring);
 147 void AddCargoDelivery(CargoID cargo_type, CompanyID company, uint32 amount, const CargoSource &src, const Station *st);
 148
 149 #endif /* CARGOMONITOR_H */